With
<a href="https://pngquant.org/" target="_blank"
  ><img
    width="30"
    height="32"
    src="/tips_data/pngquant.png"
    srcset="/tips_data/pngquant@2x.png 2x"
    style="float: left; padding: 0 1em 0 0"
    alt=""
  />
  pngquant</a
>
you can convert large, transparent 24-bit PNG files to a format that is 4 times
smaller, and supports alpha transparency in all browsers.
